196431537 has 4 divisors (see below), whose sum is σ = 261908720. Its totient is φ = 130954356.

The previous prime is 196431527. The next prime is 196431551. The reversal of 196431537 is 735134691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 735134691 = 3 ⋅245044897.

It is not a de Polignac number, because 196431537 - 2¹¹ = 196429489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 196431495 and 196431504.

It is not an unprimeable number, because it can be changed into a prime (196431527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32738587 + ... + 32738592.

It is an arithmetic number, because the mean of its divisors is an integer number (65477180).

Almost surely, 2^196431537 is an apocalyptic number.

It is an amenable number.

196431537 is a deficient number, since it is larger than the sum of its proper divisors (65477183).

196431537 is an equidigital number, since it uses as much as digits as its factorization.

196431537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65477182.

The product of its digits is 68040, while the sum is 39.

The square root of 196431537 is about 14015.4035617959. The cubic root of 196431537 is about 581.3045714054.

The spelling of 196431537 in words is "one hundred ninety-six million, four hundred thirty-one thousand, five hundred thirty-seven".